bornzin



May 22, 1956 J. H. BORNZIN Re. 24,155

HYDRAULIC CONTROL. FOR BALE CHAMBER DISCHARGE OPENING I Original FiledJan. 5, 1953 2 Sheets-Sheet 1 1? Inn in llllmllllll lfll E W i IIIIII'IIIIIIIIIIIIIIIIIIIIIIIA VIIIIIIIIJ'I May 22, 1956 J. H. BORNZINHYDRAULIC CONTROL FOR BALE CHAMBER DISCHARGE OPENING Y 2 Sheets-Sheet 2Original Filed Jan. 5, 1953 fm/ezzzor James H flow/73:72

Fflunm -..........i.r....m\flNi-? 1 llfl a 0. QON MN WNN N m v James H.Bornfln, La Grange, lll., asslgnor United States Patent Oflice RM t:

- 4 tion of the star wheel. j

HYDRAULIC CONTROL FOR BALE CHAMBER Still another important .object ofthis invention is to DISCHARGE OPENING J #matically controlling the sizeof the discharge Opening of a bale forming chamber wherein fluid underpressure may be employed to contract the bale chamber discharge opening,or fluid may be bypassed or partially bypassed order to vary the degreeof contraction and/or the fluid national Harvester Company, a of lerleyU Organ! No. 2,718,189, dated September 20, l95! Serla1l 0. 329,555,January 5, 1953. Application for reissue November 7, 195$,Serlal No.545,586 a ha-med with the discharge opening ay p a" 13 3m (CL 100-43 1:Hde'pendent upon the density of thehay within the bale d in h b Iforming chamber. a Matter en oaed eavy Mlle aPl 'I Other and furtherimportant objects and advantages of m "tent 'f r w gg fl m 16 thisinvention will become apparent from the disclosures g 12 n u e r I e inthe following specification and accompanying drawings. in v; lathedrawings:

This invention relates to a new and improved hydraulic 1 is side nllYtew of the real' P On control for bale chamber discharge opening. U r ahay 14 55 5 a reservoir depending upon of my supply a valve means in ahydraulic system for auto-' tinder pressure delivered to the contractingmeans may be I The control of the size of the discharge op ning of aFigure 2 is a mfional view taken on the Figure l-. hale forming chamberis important In determining the 1 1 density of the bales being made.This is particularly true Flame 3 P" enlarged fragmentary of fieldtraversing hay balers wherein the bale in process K of g h i i Show Infigure 1 and of being made is pushed or compacted against the bales Pansm won,

previously made and still within the bale forming chamber. Figure 4 is atop Plan View of a m of the device hown in Figure 3' These completedbales still within the chamber thus form as i a back pressure by reasonof their resistance to discharge 5 secuonal take on M which resistanceis determined by the size of the bale sure an chamber discharge owningAnyone baling hay is Figure 6 is a vertical sectional view ofthevalvemeans sirous of obtaining bales of uniform density so that the 32:52::in the device of invention as shown in bales weigh substantially thesame amount. Various 7 conditions of the hay being baled require varioussizes Show m f' a ig g of discharge openings in order to accomplishbales of f 'f 3 y g be 1 F: uniform density, thus if the hay is dampwhen baling is e 9 e c m r as m en commenced there will be a greaterfriction between the a Inasmuch as fqrms no pan of the prcsem .F hay andthe balechamber walls than when the hay is dry, "8" f f z h ti i g; endof i f ift g which very often occurs if the sun is permitted to dry am z5. 5 f q g l e the hay for a longer period of time. It is thus apparenti argedopegmg ed t iz that the bale chamber discharge opening must haveits size "fi cfmceme 9 g e e W constantly varied in order to producebales of uniform emerging from the arse en in of bale density formingchamber 10. Hay, straw or other material to be This invention 'isdirected to an automatic control for baled; g ig i f g zhim g g' m thedischarge opening of a bale forming chamber and is g" f w 'a" animprovement over the patent to Raney 2,478,012. pres n ed d p g 5 e Aprincipal object of this invention is to provide hy- 1 ls p gf an if Yg' draulic means for varying the size of a bale chamber dist e 13 F e Qcharge opening I gs can in igure altwtnehoresran rater: I; An importantobject of this invention is the provision of 5 f g 'iz a 9 if: meansengaging the hay in a bale forming chamber to thus 2 e a e c 2: er h ans f 'z 3 vary the delivery of hydraulic fluid to a means directly i z zga zi 8 S g i f controlling'the variable discharge opening of the bale pn s be 17 h n! forming chamber. tensltonlng nfm r a ht encetlsawarThytoczdl tleen- Another important object of this invention is tosupply cm: mg nee e meansas s own at e n c a fig gz mi zggzg zn from themovement of there engage a knotting mechanism where the strand enlingends are united in a suitable knot or twist. The Still another importantob ect of this invention is to provide a combination of bale material,density feeler and needle 18 earned on an arm plvoted at 20 on the baleadapted to swing upwardly through the chamber 10 andforming chamber 10.The needle 18 is shielded by means 2323;333:2311 further importantobject of this in- 9 an Guam guard 21 depending bneaih the bale formvention is the provision of a hay engaging star wheel, the m3 chamber Abrake member 22 formed the depth of penetration of which directly variesthe vbale guard swps f chamber discharge opening and simultaneously therotaf needle F Posmontion of this same star wheel actuates a hydraulicpump to W 8 mechamsm IS not Pcmnem t0 lobe ff a ni f h 1, h b di hOpendescribed herein but it does show the environment for the ing and/orthe fluid under pressure may be bypassed to invention and provides thelogical reasoning for the means' '5 arranged to bias or urge the framemember 63 into closer relationship with the top of the chamber 18 andthus urge greater penetration of the 59 within the hay 61. The spring ismounted standard 11 and is confined thereon between washers 12 and 73. Anut 14 holds the spring end washers 72 and 73 downwardly against a late15 welded as shown at 16 and 77 to the spaced s" s: ag s g" is providedwith a circlular hole or aperture 80 through which the vertical standard11 is free to slide. The base of the standard 11 is shown at 81 and iscarried to the member 82. The spring 76 thus actively urgesengagement'of the hay 61 by the star wheel 59 and the depth ofpenetration of the star wheel, and thus concurrently the downwardmovement of the rectangular frame 63 is dependent upon the density ofthe hay 61 within the bale forming chamber and the strength of thespring. As shown in Figure 3, the hay 61 is moved through the baleforming chamber 19 in the general rearward direction as indicated by thearrow 84. It is the function of the device of this invention toautomatically vary. the size of the discharge opening 12 of the baleforming chamber 19 in response to the depth of penetration of this starwheel 59.

Fluid to be used in the hydraulic system of this device is stored in areservoir 85. This reservoir is fastened by I bolt means 86 tothevertical portion 87 of the frame 68. A cap 88 is provided at the top ofthe reservoir 85 and thus fadlitates refilling of hydraulic fluid asnecessary. A combination hydraulic pump and valve housing 89 is equippedwithfa flange 90 around its base portion and by means of bolts 91 isfastened to the horizontal portion 82 of the frame 68. It is thusapparent that the vertical swinging movement of the rectangular frame 63is with respect to both the vertical standard 71 around which the spring78 is carried and also the hydraulic pump and valve housing 89. Thehydraulic pump within the housing 89 is shown at 92. This pump or powerconverter 92 is of the reciprocating piston type and there is shownprojecting therefrom a piston rod 93 which is hingedly attached at 94 toan arcuately swingable arm 95. The arm 95 is hinged at 96 to a framemember 97 hingedly carried on the combination pump and valve housing 89and 98. LA cammed rotor 99 is fastened to the star wheel carrying shaft62 and is arranged to rotate with the star wheel 59 as that wheelreceives rotational drive by reason of movement of the hay 61 throughthe bale chamber and 19 of the hinged rectangular frame 63. The 1 10. Awheel 100 is journaled for rotation on the arm by means of a stub shaft101. A ball bearing member 192 is disposed between the shaft 101 and thewheel memher 190 so that the wheel may rotate relatively free offrictional interference. The wheel 100 is adapted to ride on the outerperiphery of the cam rotor 99. The wheel 198 is arranged to havecontinual contact with the cam periphery because of a spring 103arranged to pull the upper end of the arm 95 rearwardly toward the endof the hinged frame 63. The spring is anchored at 104 on the upper endof the arm 95 and its rearward end at 105 on a hook member 106 which isbolted or otherwise fastened at 197 to an extension lug 108 of thehinged rectangular frame 63. The cam rotor 99 is provided with liveradially extending lobes 109 which have intermediately disposed valleys110. As the star wheel 59 and cam rotor 99 rotate in the direction ofthe arrow 111, the arm 95 is swung back and forth alternately as thelobes 189 engage the wheel 100 on the arm 95 and then 'vthe wheel dropsdown into the valley 110 by reason of the spring 193 maintaining contactof the wheel 100 with Ahe outer periphery of the cam rotor 99. This backand forth swinging movement of the arm 95 causes the purnppiston 93 toreciprocate within the pump 92 causing fluid to be drawn from thereservoir 85 through a con- 75 6 I duit 112 and by means of the valveportion 113 of the combination valve and pump 89, the fluid underpressure is thereafter delivered through either a conduit 114 to thecylinder 33 or through a conduit 115 leading back to the reservoir 85.The delivery of fluid under pressure is thus controlled by the valvemechanism 113.

The arm 95 would normally move in a arcuate path back and forth toactuate the piston rod 53 of the pump 92 but in order to compensate forthe arcuate movement and to prevent binding of the mechanism, the lowerend of the arm 95 is pivoted as previously stated at 96 so that thislower attaching point 96 may move slightly up and down in an arcuatepath about the arm 91, so there is an absence of binding within thepiston rod 93.

It should be understood that the source of power for this hydraulic pumpor power converting element 92 is obtained by reason of rotation of thedensity measuring star wheel 59. An upwardly extending handle portion116 is formed as an integral part of the pivoting arm 95 and thuspermits the operator of this machine to manually actuate the pump 92 atcertain times such as when the baling machine has been inactive for someperiod of time and there is an absence of fluid under pressure in thesystem and/or when it is desired to supplement the fluid under pressureby manually actuating the pump over and above that automatic operationby movement of the hay 61 through the bale forming chamber 19.

As best shown in Figure 6, the valve 113 is of the ball check type andincludes a vertical cylindrical passage 111 within the housing 89 and aballvalve 118 which is adapted to have vertical movement within thepassage 117. A spring 19 is adapted to urge the ball valve 118 in itslower position in the passage 111 and against the ball seat 121 in thebottom thereof. The pump 92 is adapted to deliver fluid under pressurethrough the passage 120 into a slightly enlarged chamber 122 beneath theseat 121 in the valve block or housing 89. As shown in Figure 6, theposition of the valve 118 is such that all of the fluid put underpressure by the pump 92 will be delivered to the cylinder 33. Theenlarged chamber 122 is joined to the cylinder conduit 114 by a coredpassage 123. Fluid is blocked from entering the vertical valve passage117 by reason of the spring urged ball check valve 118. However, thisblocking may be removed by pressures in the cylinder 33 exceeding thespring pres sure on the ball whereby the ball 118 rises and fluid ispermitted to by-pass back to the fluid reservoir through the coredpassage 124 to the reservoir conduit 115.

it is the object of this device to elfect a change in the forces appliedby the ball closing spring 119 by the various vertical positionings ofthe rectangular frame 63. A cross bracket member 129 spans the sides 78and 19 of the rectangular frame 63 in much the same manner as the plate75. Here again the plate bracket 129 is welded at 130 and 131k) thespaced arms 78 and'79 of the frame 63. An adjustable screw member 132threatedly engages the bracket member 129 and extends downwardlytherethrough. A handle 133 is adapted to be engaged by an operator andthe screw may be adjusted vertically for varying the point of contactwith an upwardly extending slide member 134 from the housing 89. Thisslide member 134 is best shown in Figure 6 wherein it has verticalsliding movement through a threaded bushing 135 engaging the top opening117 in the combined pump and valve housing 89. The lower end of theslide member 134 carries a cap like member 134a which fits over the topof the spring 119. When the rectangular frame 63 is in an upper positionat a time when the star wheel 59 has difliculty penetrating the hay-61there will be a minimum of spring force holding the ball 118 inengagement with the seat 121 wherein no fluid will be added to thecylinder 33 but rather the fluid is diverted through the check valve 118and delivered back to the reservoir. Conversely when the star wheel 59penetrates the hay 61 to a greater extent, the rectangular frame 63.be-actuated with greater llito'begrestly making dltllcult check valve110 so that a major portion under pressure from the pump-92 is of thedischarge opening 12. -A pressure gauge 38 is attached to the conduit114 so that the operator thedevicemayeonstantlybeawareoftheamount the114 leading to the cylinder 33.

device of this invention is'relatively automatic to the compensating ofthe size of the disng of the density of the bales regardless of thecondition the hay being baled. This is accomplished by the hydraulicmeans described which directly contracts or esthe discharge opening 12by reason of a fluid under the source of power for which is the rotationof the hay penetrating wheel. The density of the baled hay directlycontrols the amount of contraction or expansion of the bale chamberdischargeopening. it should be apparent also that the responsiveness ofthe valve 113 may be made more or less critical by reasonoftheadjustment of the screw 132 whereby the ball valve 118 may eat upontheposition of the rectangular frame 63 on which the penetratingmechanism is all carried.

Numerous details of construction may be varied throuflrout a wide rangewithout departing from the principles disclosed herein and], therefore,do not propose limiting the patent granted hereon otherwise than isnecessitatedby the appended claims.

What is claimed is:

1. An operating mechanism for controlling the size of a bale chamberdischarge opening comprising a bale forming chamber through whichmaterial to be baled is a means for directly varying the size of thebale chamber discharge opening, a supporting structure mounted on thebale forming chamber, an arm hingedly mounted on said supportingstructure, a bale penetrating wheel mounted for rotation on said am,spring means biasing said arm and penetrating wheel toward engagementwith said bale, whereby the bale penetrating wheel is rotated bymovement of the bale material within the bale forming chamber and thedepth of penetration of said wheel depends upon the density of the balematerial, means driven by rotation of said penetrating wheel foractuating said means for directly varying the size of the bale chamberdischarge opening and means dependent upon the degree of penetration ofsaid bale penetrating wheel controlling the degree of actuation of saidmeans for directly varying the size of the bale chamber dischargeopening. a

2. A device as set forth in claim 1 in which the means for directlyvarying the size of the bale chamber discharge opening is a hydraulicmeans.

3. A device as set forth in claim 2 in which the means driven byrotation of said penetrating wheel comprises a lever arm pivotallymounted on said supporting struc- ,ture, a multiple lobed cam wheeldriven by said penetrating wheel, means causing said lever arm to engageand follow said cam wheel whereby the lever arm rocks about its pivotalmounting, a fluid supply, a piston type hydraulic pump, link meansjoining said rocking lever arm to said hydraulic pump wherebyv saidpistontype hydraulic pump is actuated by rotation of the balepenetrating wheel, and conduit means joining said piston type hydraulicpump'to said hydraulic means for delivery of fluid under pressurethereto.

tothecylinticrltothusdecrcaseot'contract a bale, forming chamberdependent iii or lesser fluid pressures'depend- 4. A device as set forthin claim 3 in which the means dependent upon the degree of penetrationincludes valve means for controlling the admission-or exhausting offluid under-pressure to said hydraulic means.

5. A device as set forth in claim 4 in which said valve means comprisesaball check valve, and spring means urging said valve toward a closedposition.

said hingedly mountedarmtorvary nlthe6.Adeviceassetforthin'clsim$inwhichthereis means interconnecting saidspring means arm has a hand engaging portion to provide for manualoperation of said hydraulic pump.

9. Adeviceas-setforthinclaimlihwhichthemeans driven by rotation or saidpenetrating wheel comprises a lever arm pivotally mounted on saidsupporting structure, a cam wheel driven by said penetrating wheel,means causing said lever arm to engage and follow said cam wheelwherebythe lever arm rocks about its pivotal mounting supplying a driving forcefor actuating said means for directly varying the size of the balechamber discharge opening.

10. An operating mechanism for controlling the transverse size of a balechamber comprising a bale forming chamber through which material to bebaled is passed, a means for directly varying the size of the balechamher, a supporting structure mounted on the bale forming chamber, anarm hingedly mounted on said supporting structure, a bale penetratingwheel mounted for rotation on said arm, spring means biasing said armand penetrating wheel toward engagement with said bale,

whereby the bale penetrating wheel is rotated by rnovement of the balematerial within the bale forming chamber and the depth. of penetrationof said wheel depends upon the density of the bale material, meansdriven by said penetrating wheel for actuating said means for directlyvarying the size of the bale chamber, and means dependent upon thedegree of penetration of said bale penetrating wheel controlling thedegree of actuation of said means for directly varying the size of thebale chamber.

11. An operating mechanism for controlling the cross sectional size of abale chamber comprising a bale forming chamber through which material tobe baled is passed, a means for directly varying the size of the balechamber, asupporting structure mounted on the bale forming chamber, anarm hingedly mounted on said suplast named means rotatably driven inresponse to movement of the material to be baled through said-baleforming chamber. v

12. An operating mechanism for controlling the cross sectional size of abale chamber comprising: a bale forming chamber through which materialto be baled is passed, a means for directly varying the size of the boleforming chamber, said means including a power converting element, a baleengaging member, means mounting said bale engaging member for movementinto and out of said bale, means biasing said bale engaging membertoward engagement with add bale, means compressing material to be baledwithin said bale forming chamber, and means to drive said powerconverting element by ma bole engaging member, ta um named means bymovement of'materiai through nid bale forming chamber.

13. An operating mechanism for controlling panagc of material through abois chamber comprising: a bcis Q Iormingehamberthmughwhichmateriaitobebeiedie passed, a mean: for directly restricting pauageof materiai through the baie forming chamber, mid meane incheding apower converting element, a baie engagingmembenmearumountingeaidbaieengagingmember for movement into and out ofsaid 'baie, mean-I biasing said baie engaging member toward engagementwith said bale, means compreuing material to be baled within laid baieforming chamber, and mean: to drive laid power 10 iaet named mean:driven by movement of material through mid bale forming chamber.

Referelceecltedinlhefl leofthilpctent or the original patent UNITEDSTATES PATENTS 7 2,478,012 Raney Aug), 1949 2,576,184 Dodds et a! Nov.21, 1951 converting element by nid bale engaging member, laid m2.613.590 Gny ill 1952

